6542404990 has 32 divisors (see below), whose sum is σ = 12856203360. Its totient is φ = 2377334400.

The previous prime is 6542404937. The next prime is 6542404991. The reversal of 6542404990 is 994042456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6542404991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136380 + ... + 178000.

It is an arithmetic number, because the mean of its divisors is an integer number (401756355).

Almost surely, 2^6542404990 is an apocalyptic number.

6542404990 is a deficient number, since it is larger than the sum of its proper divisors (6313798370).

6542404990 is a wasteful number, since it uses less digits than its factorization.

6542404990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43068.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 6542404990 is about 80885.1345427576. The cubic root of 6542404990 is about 1870.3051719630.

The spelling of 6542404990 in words is "six billion, five hundred forty-two million, four hundred four thousand, nine hundred ninety".